Java tutorial
//package com.java2s; /* * * This file is part of the XiPKI project. * Copyright (c) 2014 - 2015 Lijun Liao * Author: Lijun Liao * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * THE AUTHOR LIJUN LIAO. LIJUN LIAO DISCLAIMS THE WARRANTY OF NON INFRINGEMENT * OF THIRD PARTY RIGHTS. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the XiPKI software without * disclosing the source code of your own applications. * * For more information, please contact Lijun Liao at this * address: lijun.liao@gmail.com */ import java.util.LinkedList; import java.util.List; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class Main { public static List<Element> getAllElementsWithAttrId(final Element element, final String namespace) { List<Element> list = new LinkedList<Element>(); if (elementHasId(element, namespace)) { list.add(element); } NodeList children = element.getChildNodes(); for (int i = 0; i < children.getLength(); i++) { Node child = children.item(i); if (child instanceof Element == false) { continue; } addAllElementsWithAttrId(list, (Element) child, namespace); } return list; } private static boolean elementHasId(final Element element, final String namespace) { return element.hasAttributeNS(namespace, "Id"); } private static void addAllElementsWithAttrId(final List<Element> list, final Element element, final String namespace) { if (elementHasId(element, namespace)) { list.add(element); } NodeList children = element.getChildNodes(); for (int i = 0; i < children.getLength(); i++) { Node child = children.item(i); if (child instanceof Element == false) { continue; } Element childElement = (Element) child; if (elementHasId(childElement, namespace)) { list.add(childElement); } addAllElementsWithAttrId(list, childElement, namespace); } } }